| /* Target-dependent, architecture-independent code for DICOS, for GDB. |
| |
| Copyright (C) 2009-2012 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "defs.h" |
| #include "osabi.h" |
| #include "gdb_string.h" |
| #include "solib.h" |
| #include "solib-target.h" |
| #include "inferior.h" |
| #include "dicos-tdep.h" |
| |
| void |
| dicos_init_abi (struct gdbarch *gdbarch) |
| { |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| |
| set_solib_ops (gdbarch, &solib_target_so_ops); |
| |
| /* Every process, although has its own address space, sees the same |
| list of shared libraries. There's no "main executable" in DICOS, |
| so this accounts for all code. */ |
| set_gdbarch_has_global_solist (gdbarch, 1); |
| |
| /* The DICOS breakpoint API takes care of magically making |
| breakpoints visible to all inferiors. */ |
| set_gdbarch_has_global_breakpoints (gdbarch, 1); |
| |
| /* There's no (standard definition of) entry point or a guaranteed |
| text location with a symbol where to place the call dummy, so we |
| need it on the stack. Rely on i386_gdbarch_init used also for |
| amd64 to set up ON_STACK inferior calls. */ |
| |
| /* DICOS rewinds the PC itself. */ |
| set_gdbarch_decr_pc_after_break (gdbarch, 0); |
| } |
| |
| /* Return true if ABFD is a dicos load module. HEADER_SIZE is the |
| expected size of the "header" section in bytes. */ |
| |
| int |
| dicos_load_module_p (bfd *abfd, int header_size) |
| { |
| long storage_needed; |
| int ret = 0; |
| asymbol **symbol_table = NULL; |
| const char *symname = "Dicos_loadModuleInfo"; |
| asection *section; |
| |
| /* DICOS files don't have a .note.ABI-tag marker or something |
| similar. We do know there's always a "header" section of |
| HEADER_SIZE bytes (size depends on architecture), and there's |
| always a "Dicos_loadModuleInfo" symbol defined. Look for the |
| section first, as that should be cheaper. */ |
| |
| section = bfd_get_section_by_name (abfd, "header"); |
| if (!section) |
| return 0; |
| |
| if (bfd_section_size (abfd, section) != header_size) |
| return 0; |
| |
| /* Dicos LMs always have a "Dicos_loadModuleInfo" symbol |
| defined. Look for it. */ |
| |
| storage_needed = bfd_get_symtab_upper_bound (abfd); |
| if (storage_needed < 0) |
| { |
| warning (_("Can't read elf symbols from %s: %s"), |
| bfd_get_filename (abfd), |
| bfd_errmsg (bfd_get_error ())); |
| return 0; |
| } |
| |
| if (storage_needed > 0) |
| { |
| long i, symcount; |
| |
| symbol_table = xmalloc (storage_needed); |
| symcount = bfd_canonicalize_symtab (abfd, symbol_table); |
| |
| if (symcount < 0) |
| warning (_("Can't read elf symbols from %s: %s"), |
| bfd_get_filename (abfd), |
| bfd_errmsg (bfd_get_error ())); |
| else |
| { |
| for (i = 0; i < symcount; i++) |
| { |
| asymbol *sym = symbol_table[i]; |
| if (sym->name != NULL |
| && symname[0] == sym->name[0] |
| && strcmp (symname + 1, sym->name + 1) == 0) |
| { |
| ret = 1; |
| break; |
| } |
| } |
| } |
| } |
| |
| xfree (symbol_table); |
| return ret; |
| } |